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Finding the Fourth Proportional to 156.80, 216.24 and 124.04

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Solution

The fourth proportional to 156.80, 216.24 and 124.04 is: 171.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.80 : 216.24 = 124.04 : x
  2. Step 2: Convert to fraction form
    156.80/216.24 = 124.04/x
  3. Step 3: Cross multiply
    156.80x = 216.24 × 124.04
  4. Step 4: Simplify right side
    156.80x = 26,822.41
  5. Step 5: Solve for x
    x = 26,822.41/156.80
  6. Step 6: Final answer
    x = 171.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.